Tripart sectional helmet with planar springs



FIG. 1 is a perspective view of a first embodiment showing our new design for a tripart sectional helmet with planar springs;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is an underside view of the top elevation thereof.

The broken lines shown in the drawings depict unclaimed environment only and form no part of the claimed design. 

CLAIM The ornamental design for a tripart sectional helmet with planar springs, as shown. 